/*
 *	Ogg.java
 *
 *	This file is part of Tritonus: http://www.tritonus.org/
 */

/*
 *  Copyright (c) 2000 - 2001 by Matthias Pfisterer
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as published
 *   by the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/*
 |<---            this code is formatted to fit into 80 columns             --->|
 */

package org.tritonus.lowlevel.ogg;

import org.tritonus.share.TDebug;

/**
 * libogg loading.
 */
public class Ogg {
	private static boolean sm_bIsLibraryAvailable = false;

	static {
		Ogg.loadNativeLibrary();
	}

	public static void loadNativeLibrary() {
		if (TDebug.TraceOggNative) {
			TDebug.out("Ogg.loadNativeLibrary(): begin");
		}

		if (!isLibraryAvailable()) {
			loadNativeLibraryImpl();
		}
		if (TDebug.TraceOggNative) {
			TDebug.out("Ogg.loadNativeLibrary(): end");
		}
	}

	/**
	 * Load the native library for ogg vorbis.
	 * 
	 * This method actually does the loading of the library. Unlike {@link
	 * loadNativeLibrary() loadNativeLibrary()}, it does not check if the library
	 * is already loaded.
	 */
	private static void loadNativeLibraryImpl() {
		if (TDebug.TraceOggNative) {
			TDebug.out("Ogg.loadNativeLibraryImpl(): loading native library tritonusvorbis");
		}
		try {
			System.loadLibrary("tritonusvorbis");
			// only reached if no exception occures
			sm_bIsLibraryAvailable = true;
		} catch (Error e) {
			if (TDebug.TraceOggNative || TDebug.TraceAllExceptions) {
				TDebug.out(e);
			}
			// throw e;
		}
		if (TDebug.TraceOggNative) {
			TDebug.out("Ogg.loadNativeLibraryImpl(): loaded");
		}
	}

	/**
	 * Returns whether the libraries are installed correctly.
	 */
	public static boolean isLibraryAvailable() {
		return sm_bIsLibraryAvailable;
	}
}

/*** Ogg.java ***/
